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Table 3 PTR values in herds of different size within each herd category (ImpoCattle or NoImpoCattle)

From: Evaluation of temporal surveillance system sensitivity and freedom from bovine viral diarrhea in Danish dairy herds using scenario tree modelling

   

PTR with 1 PI

PTR with 1 TI cow

Herd category

Test

Herd size (in cows)

HRP = 90 days

HRP = 365 days

HRP = 90 days

HRP = 365 days

ImpoCattle

blocking ELISA

24

175 (35.0)

343 (68.6)

0 (0.0)

23 (4.6)

  

180

0 (0.0)

206 (41.2)

0 (0.0)

2 (0.4)

  

1070

0 (0.0)

14 (2.8)

0 (0.0)

0 (0.0)

 

SVANOVIR

24

468 (93.6)

486 (97.2)

165 (33.0)

308 (61.6)

  

180

240 (48.0)

376 (75.2)

0 (0.0)

38 (7.6)

  

1070

3 (0.6)

281 (56.2)

0 (0.0)

9 (1.8)

NoImpoCattle

blocking ELISA

1

500 (100.0)

500 (100.0)

500 (100.0)

500 (100.0)

  

123

0 (0.0)

248 (49.6)

0 (0.0)

3 (0.6)

  

1185

0 (0.0)

8 (1.6)

0 (0.0)

0 (0.0)

 

SVANOVIR

1

500 (100.0)

500 (100.0)

500 (100.0)

500 (100.0)

  

123

314 (62.8)

397 (79.4)

2 (0.4)

47 (9.4)

  

1185

1 (0.2)

278 (55.6)

0 (0.0)

12 (2.4)

  1. PTR Iterations out of 500 (in %), where the threshold prevalence of antibody positive milking cows was reached in a herd, using the stochastic simulation model by Foddai et al. [9] and according to test used (blocking ELISA vs. SVANOVIR) sampling day (HRP of 90 or 365 days), and BVDV introduction route (PI calf or TI cow)